Paper-feed mechanism



July 28, 1925.

o. A. H OKANSO N PAPER FEED MECHANISM 7 Filed July 1 1920 5 Sheets-Sheet 1 July 28, 1925' 1,547,326

' o. A. H-QKANSON PAPER FEED MECHANISM Filed July l7, 1920 3 Sheets-Sheet 2 Q. A. .HOKANSON PAPER FEED MECHANISM "Filed July 1'7, 1920 July 2s, 1925.

3' Sheets-Sheet 5 1 Patented July 28, 1925.

UNITED STATES 1,547,326- PATENT, OFFICE.

OT-TO AJHoxANsoN', or woons'rocx, rumors, ASSIGNOR 'ro woons'rocx rYPEwm'rER COMPANY, or woonsroox, ILLINOIS, A coaromrron or ILLINOIS.

PAPER-FEED Application filed July 17,

To all whom it may concern: v

Be it known that I, O'rro A. HoKANsoN, a citizen of the United States, residing at Wood-stock, in the county of 'McHenry and- State of Illinois, have invented certain new and useful Improvements in Paper-Feed Mechanism, of which the following is a specification This invention relates generally to typewriters, and more specifically to the paper platen and the mechanism connected there- "with by which thepaper is held and guided about the platen so that it will be fed relative thereto when the platen is rotated.

The'inv'entionhas fo'r'its object the pro- .vision of mechanism of the class named which shall be-of improved construction and operation. It is exemplified in thecombination and arrangement ofparts shown in theiaccompanyin'g drawings and described in the following specification, and it is more particularly pointed out in the appended claims.

in the drawings w Fig. 1 is a fragmentary front elevation of a portion of a typewriter platen carriage showing one embodiment of'the present-in-= vention applied thereto;-v

2 is a top plan view of the mecha nism shown iii Fig.- 1, with parts omitted;

and I Fig. 3 is an end elevation of the mac-ha nisrn shown in Fig. 1, with parts in section.

Although the invention is applicable to various forms of typewriters, the embodi: merit of the invention illustrated in the drawings is represented as being applied to a ty ewriter having a folding support for the later. carriage arranged to permit; the typewriter parts to be folded into com pact relation.

A. portion of the main frame of a typewriter is shown-1n. Fig. 3 and designated by U the numeral 10 on which a pair of arms 11 are pivoted at 12. A platen carriage frame is mounted on t ends of the arms 11 and may be swung train the position shown in Fig. 3 aboutthe pivot 12 to folded or inoperative position. it. platen carriage 14 is mounted the carriage frame 13 and is provided with ball bearings 15 to facilitate the movement of the carriage on its frame. each end of the carriage14= are brackets er and plates 16 and 1? arranged in upright position for supporting a platen 18 which is MECHANISM.

1920. Serial No. 396,888.

provided with a spindle or shaft 19 journaled ;to rotate in the brackets lo and 17.

The bracket 16 is bored to receive one end of the spindle 19, and the braeket'17 is provided with an open notch 20 carrying a sleeve 21 which forms a bushing for the end of the spindle 19 supported by the bracket 17. The sleeve 21 is provided with flanges 22 and 23 and a tubular extension 24, the

end-of which bears against a collar 25 secured to the platen shaft adjacent the end i in the opening 20 by a hook 27 pivoted at i 28 on the end plate 17 and provided with a finger-piece 29 by which it may be swung -forwardly to release the sleeve 21. the hook 27 is disengaged from the sleeve the end of the platen may be lifted until it clearsthe end plate 17, afterwhichthe opposite. end of the platen shaft may be withdrawn from the bearing in theend' plate 16, and thus the platen may be easily removed fromv its support in the platen carriage. The hook27. is formed to provide a seat 30 having the sameradius as the outer periph cry of the sleeve 21 so that the hook'will' snap into place on the top of the sleeve and will not be accidentally disengaged. A depression30' is provided in the end plate 17 and a knob is formed on the inner face of the hook 27 for engaging the depression 30 to retain the hook in position when disengaged from the sleeve 21.

Two sets-of feed rollers 31 and 32 are arranged to bear against the periphery of the platen 18 and hold the paper against the surface oat-the platen so that-when the platen is rotated the paper -.wiil be. fed about its periphery. The roller 31 is mounted on a spindle 33, and the rollers 32 are carried by a spindle-34. The spindles and 34: are 'journaled in opposite ends rocker arms 35 which are pivoted on a bar or rod 36. A paper deflector or guide 37 of sheet material is provided with downwardly bent ears 38 which are pivoted on the rod 36 adjacei t the rocker arms 35, the ears being provided with bifurcations 39- which are slightly closed at their outer ends so that When I they will snap over the bar 36 and thus be retained in position. In Fig. 2 the ears 38 are shown. in section with the deflector 37 removed, but the positlon and outline of the defiector in this figure are indicated by broken lines. It will be seen that the deflector 37 is provided with cut-away portions to permit the rollers 31 and 32 to probracket 45, and the brackets 45 are connect ed by a bar 46 extending transversely of the typewriter and secured to its supporting brackets by screws 47. Each of the brackets 45 carries a downwardly bent flange 48 having a knob 49 punched rearwardly thereon which engages one end of a coil spring 50. .The opposite end of the spring 50 is supported by an adjustable screw 51 having a look nut 52. The spring 50 presses forwardly on the flanges'48 of the brackets 45 so that the links 41 are forced upwardly to hold the rollers 31 and 32 resiliently against the periphery of the platen 18. The amount of pressure between the rollers and platen is regulated by the adjustment screw 51. The link 41 is provided with an upwardly extending lever arm 53 by whichthe bar 46 and the brackets 45may be swungrear'wardly against the force of the spring 50 to release the paper from the pressure of the rollers 31. and 32. The lever arm 53 is provided with a lug 54 which 00- operates with a projection 55 on the plate 17 to hold the arm-forwardly to retain the rollers 31 and 32 in their released position. The lug 54 may be readily swung past the projection 55 by a slight lateralmovement of the lever arm 53.

For retaining the upper edge of the paper in position against the platen above the printing line a paper bail or bar 56 extends longitudinally of the carriage and is supported on arms 57 pivoted at 58 on the end plates 16 and 17. A spring 59 is secured to each arm 57 and to the platen carriage endplates to hold the bar 56 in resilient engagement with the platen, If the bar 56 is drawn forwardly until the axis of the sprin 59 passes the pivotal center 58 the bar will be retained in its forward position, and stops 60 are provided on the carriage end plates to limit the forward movement of the bar.

/ A supplemental paper guide 61 is supported at 62 on the carriage 14 in position to direct the upper edge of the paper along a plane lying between the bar 56 and the platen when the bar is in its forward or inactive position. When it is desired: to place a sheet of paper. in the machine the paper bail, including the bar .56 andsupportmg arms 57 is swung forwardl and the paper inserted between the guide3 and the platen. Rotation of the platen will automatically feed the forward edge of the paperbetween the paper bail and the surface of the platen without the necessity. of anymanipulation of the paper on the part of the operator to guide it beneath the paper bail. After the paper has. been thus moved to position a ,touch' on the paper bail will return it to its be easily swung forwardly to permit the operator to see the mechanism at the back of the typewriter frame when desired.

I claim 1. In a typewriter, a platen support having spaced end plates,.a platen 1ournaled between said end plates a bracket pivotally mounted on each of sai end plates, a ivot rod extending longitudinally of said p aten and sup orted by said brackets, rocker arms mounte on said pivot rod and having rollers carried therebetween at opposite ends thereof and arranged to engage the periphery of said laten, a paper guide plate pivoted on said rod. and bridging the space between said rollers to guide a sheet of paper from one of said rollers to the other, and resilient means for exerting ressure on said brackets to yieldingly ho d said rollers against the periphery of said platen. I

2. In: a typewriter, a glaten support having a platen journaled t "'erein, a ivot rod extend ng longitudinally of said p aten and having rocker arms p1votally mounted" in spaced relation thereon, rollers journaled in spaced relation on said rocker arms and arranged to engage the riphery of said l-aten, and a paper id plate for'directmg a sheet of paper rom one of saidrollersto the other, said guide plate having bifurcated projections arranged to resiliently snap over said pivot rod to pivotally support said paper guide plate. y

3. In a typewriter, a platen support having a pair of spaced end plates, a platen journaled between said end lates, a bracket pivotally mounted on cue of said end plates, means for connecting said brackets arranged to engage a sheet of to holdthem against angular displacement relative to one another upon their pivotal supports, paper feed rollers supported by said brackets for engaging said platen, re-

silient means for exerting pressure on said brackets to hold said ..-paper. feed rollers against said platen, and means for swinging said brackets abouttheir pivotal supports to release said paper feed'rollers from said platen.

4. In a typewriter, a platen-support comprising spaced end plates, a platen journaled between said end plates, paper feed rollers for engaging said platen to hold a sheet of paper in position against the periphery thereof, a'support for said rollers comprising a bracket pivotally mounted on one of said end plates and having a supporting arm for said rollers, a lever arm for swinging said bracket about its pivotal support,

'an adjustable spring cooperatingwith said bracket-to hold said rollers against said platen, and means for-retaining said lever arm in position to hold said rollers out of engagement with said platen.

5. In a typewriter, a platen support having a 'painof spaced end plates, a platen journaled between said end plates, a bracket pivotally mounted on each of said end plates, means for .connecting said brackets to hold them in fixed angular position relative to one another, supporting arms con-. nected with said brackets, a pivot rod connectin said supporting .arms, rocker bars pivota ly mounted on said rod in spaced relation relative to one another, rollers journal'ed on said rocker bars and opposite sides of said pivot rod and arranged to enga e the periphery of said platen, a paper guide plate pivotallymounted on said pivot rod and forming a bridge between said rollers for directing a sheet of paper from one to the. other thereof, springs connected with said brackets for holding said rollers against said platen, and a lever connected with one of said brackets for releasing said rollers from said platen.

6. In a typewriter, a platen carriage hav ing a platen j ournaled therein, a paper-holding bail pivoted on-said platen carriage and aper to hold paper against the perip cry. of said said bail being arranged to swing said platen,

forwardly about its pivot'and out of contact with said platen to-permit insertion of paper between'saidbar and platen, and a spring connected with said bail and arranged to be moved by said bail past a central ition so that said spring will retain said ball in either its operative or inoperative position. 1

7. In a typewriter, a platen carriage having spaced end plates, 8. platen journaled between said end plates, a-paper holding bail having supporting arms-pivotally mounted on said end plates and having a paperfrom one of said rollers plemental spring fingers arranged retaining bar extending longitudinally of said platen, said bar being movable forward away from said platen into an inoperative position to permit insertion of paper between said bar and platen, a stop for limiting the movement of said bar away from said platen, and a spring connected with said bail and with one of said supporting plates at points on opposite sides of the pivotal support for said bail so that the longitudinal axis of said spring will move past the pivotal support of said bar as said bail is swung into and out of operating position.

8. In a typewriter, a platen carriage frame bar haying. a flat surface arran d to. direct.

sheets of paper againsVsaidp aten andto engage said platen at one edge of said bar,

and resilient means for holding said bar against said platen.

. 9-. In a typewriter, a platen support, a

platen journaled therein, a plurality of paper feed rollers, means for resiliently pressing'said rollers against said platen, is paper'guide for directing a sheet of paperfrom one of said rollers toanotherfa supplemental paperguide for directing the paper after it leaves said rollers, and a paper holder carried by said support and movable into av osition away from said platen-in which t e aper is directed by said supplementalgui ebetween said holder and platen. 10. A typewriter comprising a platen holder, a platen journaled in said holder, a pair of spaced rollers arranged to bear against the periphery of said platen, a paper table for directing a sheet of paper between said platen and one of said rollers, a paper guide arranged to bridge the space between said rollers and direct said sheet of paper to the other, a supplemental paper guide for directing said paper away from said last-mentioned roller and a paper bail pivot-ally mounted on sai platen holder and comprisin a bar extendmg longitudinally of said p aten and movable into one from said last-mentioned guide and into a second position, for holding said paper against said platen.

11. In a typewriter, a platen carriage, a platen journaled in said carriage, a paper guide plate secured to said carriage adjacent one edge thereof and having an edge portion arranged adjacent said platen, and supto engage said guide plate to press said guide plate toward said platen.

12. A typewriter comprising a main frame and a supplemental frame pivotally mounted'thereon, a platen carriage supported by position to receive the paper said supplemental frame and movable therewith into and out of operating position, paper feed mechanism mounted on said platen carriage and movable with said supplemental frame, said feed mechanism comprising spaoe'd rollers arranged to bear against said platen, guide plates cooperating with said rollers to direct a. sheet of paper about said platen and between said platen and said rollers, and a paper-holding device for retaining said sheet against the face of said platen at the printing line of said typewriter;

13. A typewriter comprising a main frame, arms pivoted on said frame, a platen carriage sup-port mounted on said arms, a platen carriage arranged to move along said support, a platen journaled in said carriage, paper feed mechanism for said platen comprising rollers for resiliently pressing a sheet of paper against said platen, guide plates for directing said sheet about said platen, and a paper bail pivotally mounted on said carriage and vmovable into and out of position to hold said sheet against the surface of said platen,

14, A typewriter comprising a main frame, a supplemental frame mounted on saidmain frame, a platen carriage supported by said supplemental frame and movable therewith into and out of operating position, said car- 15. In combination, a typewriter having a platen carriage thereon and movable into and out of operating position, said carriage being inverted when in its inoperative position, spaced upright plates on said carriage, a platen supported by said carriage and having a platen shaft journaled in said plates, one of said plates having a bearing for said shaft with the upper portion thereof open, and a retainer pivoted on said plate and movable into and out of position to close said opening and retain said shaftin said bearing when said carriage is inverted.

In testimony whereof I have signedmy name to this specification on this 28th day of June, A. D. 1920.

OTTO HOKANSON. 

